Chuck for paper rolls



Aug. 4, 1942. c. c. BAKER CHUCK FOR PAPER ROLLS Filed Oct. 28, 1940 2Sheets-Sheet l Inventor Craig C Baker Aug, 4, 1942. c. c. BAKER CHUCKFOR PAPER ROLLS Filed Oct. 28, 1940 2 Sheets-Sheet 2 Inventor Grazlg' CBaker Qtoreys Patented Aug. 4,1942

2,291,863 CHUCK FOR. PAPER ROLLS Craig 0. Baker, Portland, Oreg.

Application October 28, 1940, Serial No. 363,178

3 Claims. (Cl. 242-72) My invention relates to means for mounting heavyrolls of paper on reels or the like, particularly on reels in printingpresses of the news-* paper type, and my invention relates morespecifically to chucks adapted to be inserted in the ends of the tubularcores on which newsprint paper is customarily wound.

While such paper is sometimes wound in the mills on specially preparedmetal cores, which have key-ways arranged for use on the reels of thenewspaper printing presses, these special cores are expensive and thecost and inconvenience involved in returning these cores to the mills,when the paper on them has been used up, have prevented the adoption oftheir use to any considerable extent.

An object of this invention is to provide a chuck which can be used witha heavy roll of paper wound on the usual inexpensive cardboard tube orcore, and which can quickly and easily be inserted in the core to holdthe core and the paper wound on it securely in place.

In modern printing presses of the newspaper type, it is necessary toimpart rotation to each new roll of paper added to the press beforestarting to unwind the paper, so that the paper on the new roll can bejoined to the paper from the preceding used roll without entirelystopping the press. For this purpose it is customary to mount the rollson suitable spindles or stub shafts which are capable of being rotatedby a mechanism associated with the press reels. Another object of myinvention, accordingly, is to provide a chuck adapted to be mounted on aprinting press reel and to be rotated by a rotating stub shaft orsupporting stud on the reel, which is driven at predetermined speeds,and thereby permit such rotation to be imparted to the heavy roll ofpaper.

When the paper from the new roll is to be attached to or near the end ofthe paper from the preceding roll, without entirely stopping. themovement of the paper web thru the printing press, it is customary toequip this part of the printing press machine with automatic pastingmechanism, which is generally arranged so as to operate to force the endof the new roll, to which adhesive is applied, and the adjacent surfaceof the paper on the used roll firmly together and thus cause the paperof the new roll to be stuck securely to the paper from the used roll. Inorder to have this take place entirely auto matically and satisfactorilywhile the press is operating, it is necessary to have the rotation ofthe new roll, accurately synchronized with the automatic movement of thesupporting reel and with the action of the pastor. A further andimportant object of my invention, therefore, is to attain this propersynchronization by providing a chuck having means whereby the outer endsof the paper on the roll on which the paster is to operate will bedefinitely located and fixed with respect to the rotating mechanism, sothat the mechanism can all be accurately timed with respect to suchouter end of the paper on the new roll.

The above mentioned and incidental objects I attain by using a chuck,made as described briefly in the following specification and asillustrated in the drawings, in combination with a printing press reeland associated mechanism hereinafter referred to.

In the drawings:

Fig. 1 is a half side elevation and half medial longitudinal sectionillustrating the general construction of my improved paper roll chuck;

Fig. 2 is an end elevation as viewed from the right hand end of Fig. 1,with the chuck jaws slightly extended;

Fig. 3 is a transverse section taken on the line 33 of Fig. 1;

Fig. 4 is a projected end elevation showing my chuck in operativeposition in the core 'of a roll of newsprint and illustrating certainimportant features of my device; and

Fig. 5 is a schematic outline of a reel of a printing press and certainappurtenances that relate to my invention in use.

Referring first to Figs. 1, 2 and 3, my paperroll chuck consists chieflyof a substantially tubular body provided at one end with a hub of largerdiameter, a gage plate attached thereto, a plurality of radiallyextensible jaws disposed in longitudinal apertures in the body, and acentral spindle arranged to extend the jaws by rotation of a socket-headscrew accessible from the interior of the hub.

The substantially cylindrical body, indicated generally by the numeral I0, is of uniform diamter throughout the major portion of its length, butat one end is enlarged to form a hub II which is recessed as at I! toconform with, and receive, the tapered end of one of the stub shafts ofthe printing press reel as will presently appear.

The body II] has a concentric bore extending from the inner extremity(i. e. from the right hand end as viewed in Fig. l) to an aperture 13located adjacent the integral hub wall M. In this bore a jaw-actuatingspindle I5 is disposed for axial sliding movement. The spindle 15 hassymmetrical bearing surfaces at II and I1, and is formed with anintervening'series of peripheral shoulders I l, in the form of conefrustrums, which constitute inclined bearing surfaces at spaced in-'tervals for the correspondingly inclined beveled projections l8 machinedon the inner surfaces of the jaws 20.

The jaws 2Q are radially disposed in suitable apertures provided in thebody I. and are retained therein by pins 2| threaded, or otherwisesecured, in the ends of the body and extended ,into elongated holes 22formed in each end of 23 'or is otherwise serrated to increase thegripping action of the jaws when the chuck is in operative position inthe core of a roll of paper. Longitudinal movement of the spindle l andthe consequent radial motion of the jaws 20 to increase or decrease theeffective diameter of the chuck is produced by the rotation of anadjusting screw 24, the head 25 of which bears against an annularshoulder 25 formed in the hub wall 14 and the threaded portion of whichpasses through a clear hole therein and extends into a correspondinglythreaded hole 21 provided in the end of the spindle IS. The spindle I5is prevented from rotating with the screw 24' by a guide pin 28,threaded or otherwise secured, in the opposite end of the body andbearing in a suitable groove 29 (shown dotted in Figs. 1 and 2), cut inthe extending end of the spindle l5. Thus the spindle I5 is confined tolinear or longitudinal motion with respect to the body It. Since thehead 2! of the adjusting screw is not readily accessible with anordinary wrench because of its recessed position in the hub II, I havefound it advisable to make the head of the adjusting screw ofcylindrical form and with a central hexagonal or square socket forreceiving the stem of a suitable crank or wrench.

The hub I l is provided with a keyway 34 (see Figs. 1 and 4) adapted tocoincide with a key in the stub shaft of the printing press reel, onwhich the roll of paper is to be mounted. On the outer surface of thehub, removed a given angular distance from the center of the keyway 30,a gage plate ii is securely fastened, as shown in Fig. 4. On the face ofthis plate 3| I provide a pair of suitably spaced gage lines or grooves22 in parallelism with the axis of the chuck. The function of these gagelines will presently appear in the description of the use of my chuck.

When a roll of paper is to be mounted on the reel of a printing press,it is customary to prepare the end of the paper on the new roll in suchmanner that, when the roll is swung into position adjacent the web ofthe expiringroll, the paper of the new roll may be joined to the web ofthe previous roll to make a continuous sheet entering the printingpress. In conventional high speed presses, this joint or splice is madewithout interruption in the uniform speed of the presses, by automaticaction of the paper-rollcarrying reel and an automatic splicer or pasterproperly synchronized therewith. such an arrangement is illustrated inschematic outline in Fig. 5. The reel a comprises a pair of spaced whichis journaled in suitable bearing standards 0. The reel'a is so arrangedthat it rotates intermittently in clockwisev direction, and thatone pairof arms d of the spaced spiders a supports a a full roll of newsprint e,another pair of arms I carries the roll a which is being unwound while athird pair It will be ready to receive the new roll 1. When the paper isnearly unwound from the roll 0, the periphery of" the full roll e isbrought into contact with the web 1 from the expiring roll a asindicated by broken lines in Fig. 5. Furthermore, means is provided onthe arms of the reel 41 so that as the roll 0 is brought nearer the web1 of the roll a, the roll e will be rotated counter clockwise atincreasing speed until, when the roll e actually contacts the web 1!,the peripheral velocity of the roll e will coincide exactly with thelinear velocity of the web 1. At the instant of contact, the automaticsplicing attachment m presses the web tightly against the outer surfaceof the roll e, and so connects the web of the expiring roll 0, to theroll e. Another device (not shown) subsequently severs the old web.Since this entire splicing operation requires but a fraction of asecond, it is important that the prepared splice 0n the rolls of papershould be in a predetermined location on the surface of the roll withreference to the rotating mechanism.

When a new roll of paper is to be mounted on the reel of the printingpress, my chuck is inserted in one'end of the core, thus in the end ofroll i shown in Figs. 4 and 5, and the chuck is made fast in the core byturning the head 2! (Fig. 4) of the adjusting screw 24 (Fig. 1) therebytightening the screw 24, causing longitudinal movement of the spindleis, and consequent radial extension of the gripping jaws 20, whichoperation anchors the chuck securely in the core of the roll. The stripor portion of the outer surface of the paper on the roll which is to beused for slicing or attaching the paper of the new roll to the paper ofthe used-up roll is then marked off in radial alinement with the lines32 of the gage plate II. This marking can very quickly and easily bedone, for example, by using a template. Paste is then applied to thismarked-off splicing portion on the roll, which splicing may be cut intotabs t (Fig. 4). Any suitable chuck may be used for the opposite end ofthe roll. The new roll i is now moved into place between the arms 71. ofthe spiders a. of the reel a, and stub shafts are extended from the armsit into the chucks. The stub shaft 3' (Fig. 5), which is adapted toberotated by suitable mechanism (not shown) is provided with a key (notshown) which fits into the keyway 30 of my chuck, thus forcing thechuck, and with it roll 1,

to turn with the stub shaft 3' as the latter is rotated. But, since thegage plate 3| is set in predetermined proper position with respect tothe keyway 30, and since the splicing end or tabs t of the roll arelocated with respect to the gage plate 3|, as previously mentioned, itis possible to synchronize the rotating mechanism for the stub shafts s,the rotating mechanism for the triple-arm spiders a keyed to a commonshaft b specific type of reel or pasting device, for my chuck is adaptedfor general use in heavy paper mils in place of the various chucks,substitute cores, and similar devices which have been tried outheretofore.

I claim: v

1. A chuck of the character described for a paper roll, said chuckincluding, a substantially cylindrical body, said body being of uniformdiameter throughout the major portion of its length but having a hub oflarger diameter at its outer end, said hub having a recess to receivethe end of a supporting stub shaft of a printing press reel when theroll is inserted in place on said reel, means in said recess adapted tobe engaged by a cooperating element on the end of said printing reelstub shaft to prevent slippage of said stub shaft in said recess whensaid stub shaft is rotated, a plurality of radially-extendible jawsdisposed in longitudinal apertures in said chuck body, alongitudinally-slidable, jawactuating, spindle in the center of saidbody, said spindle having a series of inclined peripheral shoulders andsaid jaws having inwardly-extending projections for engaging saidshoulders, an adjusting screw for eflecting longitudinal adjustment ofsaid-spindle within said body and therewith radial motion of said jaws,the head of said adjusting screw bearing against a shoulder in the wallof said hub and accessible within the recess of said hub, means forpreventing the rotation of said spindle within said body but permittinglongitudinal movement of said spindle, and guiding means on the outersurface of said hub to facilitate the proper positioning of the chuckwithin the roll with respect to the splicing strip on the outer surfaceof said roll.

2. In a printing press a chuck of the character described for a paperroll, said chuck including, a substantially cylindrical body having ahub of larger diameter at its outer end, said hub having a taperedrecess to receive the end of a supporting stub shaft of a printing pressreel when the roll is inserted in place on said reel, means in saidrecess adapted to be engaged by a cooperating element on the end of saidprinting reel stub shaft to prevent slippage of said stub shaft in saidrecess when said stub shaft is rotated, a plurality ofradially-extendible jaws disposed in longitudinal apertures in saidchuck body, a 1ongitudinally-slidable, jaw-actuating, spindle in thecenter of said body, said spindle having a series of inclined peripheralshoulders and said jaws having inwardly-extending projections forengaging said shoulders, an adjusting screw for eifecting longitudinaladjustment of said spindle within said body and therewith radial motionof said jaws, the head of said adjusting screw bearing against ashoulder in the wall of said hub and accessible within the recess ofsaid hubthe threaded end of said screw extending into a threadedaperture in the end of said spindle, means for preventing the rotationof said spindle within said body but permitting longitudinal movement ofsaid spindle.

3. In a printing press, a chuck of the character described for a paperroll, said chuck comprising, a substantially cylindrical body having ahub of larger diameter at its outer end, said hub having a recess toreceive the end of a supporting stub shaft of a printing press reel whenthe roll is inserted in place on said reel, a keyway in said recessadapted to be engaged by a cooperating element on the end of saidprinting reel stub shaft to prevent slippage of said stub shaft in saidrecess when said stub shaft is rotated, a plurality ofradially-extendible jaws disposed in longitudinal apertures in saidchuck body, a longitudinally-slidable, jaw-actuating, spindle in thecenter of said body, said spindle having a series of inclined peripheralshoulders in the form of cone frustrums and said jaws havinginward1y-extending projections for engaging said shoulders, an adjustingscrew for efiecting longitudinal adjustment of said spindle within saidbody and therewith radial motion of said jaws, the head of saidadjusting screw bearing against a shoulder in the wall of said hub andaccessible within the recess of said hub, the threaded end of said screwextending into a threaded aperture in the end of said spindle,'awrench-accommodating socket in the head of said screw, means forpreventing the rotation of said spindle within said body but permittinglongitudinal movement of said spindle, and guiding means on the outersurface of said hub to facilitate the proper positioning of the chuckwithin the roll with respect to the splicing strip on the outer surfaceof said roll, whereby said chuck can be secured in the core before thesaid roll is moved onto the printing press reel and said chuck willinsure the proper placing of said roll when the stub shaft of the reelengages said recess.

CRAIG C. BAKER.

